At
www.boxcars.us
there are several ATSF flatcars photographed in 1985 that appear to be quite old, but the road numbers are not in my 1963 ORER.
Perhaps they are renumbered for MOW or specialized service?
Might anybody recognize an earlier number series for these cars?  
206717
206039
190257

thank you
--
Ted Larson
trainweb.org/mhrr/        --------        NASG.org        --------        https://www.nasg.org/Clubs/RegionsMinnesota.php
GN in 1965